The present invention discloses an electrosurgical system comprising an electrosurgical generator for outputting radio frequency (RF) energy an electrosurgical instrument coupled to the electrosurgical generator for applying the RF energy to an operative site and a temperature monitoring circuit comprising at least one temperature sensor for sensing a temperature at a measuring point a first temperature measurement circuit coupled to the at least one temperature sensor for generating a first temperature value a second temperature measurement circuit coupled to the at least one temperature sensor for generating a second temperature value, and a control circuit for determining a difference between the first and second temperature values and for comparing the difference to a first predetermined threshold.
